In Devise you own controllers, models and views. With Booth you don't own the models (much like ActiveStorage). The Controllers you do own, but the implementation is pretty much just calling Booth helpers. The views you own completely, just as in Devise.

Auth0 authentication for devise

Simple gem to enable rack powered Ruby apps to authenticate via REST with an enterprise CAS authentication server via X509 client certificates.

Just run rails g tsuite:install and start testing with rspec and cucumber!